./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 850d02aa9cb18294f9975f6e4e447a197934bcfd77c20fda5c55e9f9e3e0a979 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 18:01:45,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 18:01:45,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 18:01:45,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 18:01:45,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 18:01:45,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 18:01:45,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 18:01:45,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 18:01:45,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 18:01:45,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 18:01:45,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 18:01:45,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 18:01:45,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 18:01:45,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 18:01:45,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 18:01:45,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 18:01:45,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 18:01:45,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 18:01:45,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 18:01:45,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 18:01:45,993 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 18:01:45,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 18:01:45,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 18:01:45,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 18:01:45,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 18:01:46,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 18:01:46,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 18:01:46,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 18:01:46,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 18:01:46,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 18:01:46,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 18:01:46,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 18:01:46,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 18:01:46,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 18:01:46,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 18:01:46,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 18:01:46,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 18:01:46,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 18:01:46,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 18:01:46,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 18:01:46,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 18:01:46,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 18:01:46,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 18:01:46,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 18:01:46,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 18:01:46,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 18:01:46,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 18:01:46,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 18:01:46,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 18:01:46,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 18:01:46,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 18:01:46,063 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 18:01:46,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 18:01:46,079 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 18:01:46,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 18:01:46,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 18:01:46,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 18:01:46,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 18:01:46,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 18:01:46,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 18:01:46,081 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 18:01:46,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 18:01:46,081 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 18:01:46,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 18:01:46,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 18:01:46,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 18:01:46,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 18:01:46,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:01:46,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 18:01:46,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 18:01:46,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 18:01:46,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 18:01:46,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 18:01:46,083 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 18:01:46,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 18:01:46,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 18:01:46,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 850d02aa9cb18294f9975f6e4e447a197934bcfd77c20fda5c55e9f9e3e0a979 [2022-07-22 18:01:46,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 18:01:46,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 18:01:46,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 18:01:46,513 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 18:01:46,527 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 18:01:46,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2022-07-22 18:01:46,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37bd9a923/14216201a14c4570b36484cd9dec4d32/FLAG89bfebb20 [2022-07-22 18:01:47,267 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 18:01:47,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2022-07-22 18:01:47,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37bd9a923/14216201a14c4570b36484cd9dec4d32/FLAG89bfebb20 [2022-07-22 18:01:47,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37bd9a923/14216201a14c4570b36484cd9dec4d32 [2022-07-22 18:01:47,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 18:01:47,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 18:01:47,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 18:01:47,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 18:01:47,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 18:01:47,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:01:47" (1/1) ... [2022-07-22 18:01:47,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11adf2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:47, skipping insertion in model container [2022-07-22 18:01:47,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:01:47" (1/1) ... [2022-07-22 18:01:47,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 18:01:47,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 18:01:47,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c[6787,6800] [2022-07-22 18:01:47,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:01:47,994 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 18:01:48,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c[6787,6800] [2022-07-22 18:01:48,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:01:48,072 INFO L208 MainTranslator]: Completed translation [2022-07-22 18:01:48,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48 WrapperNode [2022-07-22 18:01:48,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 18:01:48,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 18:01:48,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 18:01:48,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 18:01:48,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,175 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 246 [2022-07-22 18:01:48,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 18:01:48,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 18:01:48,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 18:01:48,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 18:01:48,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 18:01:48,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 18:01:48,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 18:01:48,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 18:01:48,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (1/1) ... [2022-07-22 18:01:48,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:01:48,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:01:48,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 18:01:48,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 18:01:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 18:01:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 18:01:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 18:01:48,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 18:01:48,546 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 18:01:48,548 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 18:01:49,001 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 18:01:49,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 18:01:49,011 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 18:01:49,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:01:49 BoogieIcfgContainer [2022-07-22 18:01:49,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 18:01:49,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 18:01:49,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 18:01:49,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 18:01:49,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 06:01:47" (1/3) ... [2022-07-22 18:01:49,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35be37af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:01:49, skipping insertion in model container [2022-07-22 18:01:49,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:01:48" (2/3) ... [2022-07-22 18:01:49,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35be37af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:01:49, skipping insertion in model container [2022-07-22 18:01:49,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:01:49" (3/3) ... [2022-07-22 18:01:49,038 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2022-07-22 18:01:49,056 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 18:01:49,058 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 18:01:49,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 18:01:49,138 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c845480, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ff1f200 [2022-07-22 18:01:49,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 18:01:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 77 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 18:01:49,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:49,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:49,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash -430581620, now seen corresponding path program 1 times [2022-07-22 18:01:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539011202] [2022-07-22 18:01:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:49,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539011202] [2022-07-22 18:01:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539011202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:49,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:49,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:01:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398622053] [2022-07-22 18:01:49,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:01:49,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:01:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:01:49,630 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 77 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:49,735 INFO L93 Difference]: Finished difference Result 133 states and 215 transitions. [2022-07-22 18:01:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:01:49,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 18:01:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:49,747 INFO L225 Difference]: With dead ends: 133 [2022-07-22 18:01:49,747 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 18:01:49,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:01:49,774 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:49,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 452 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 18:01:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-22 18:01:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 103 transitions. [2022-07-22 18:01:49,840 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 103 transitions. Word has length 25 [2022-07-22 18:01:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:49,840 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 103 transitions. [2022-07-22 18:01:49,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 103 transitions. [2022-07-22 18:01:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 18:01:49,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:49,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:49,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 18:01:49,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash -482254910, now seen corresponding path program 1 times [2022-07-22 18:01:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:49,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994721702] [2022-07-22 18:01:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:49,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:50,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994721702] [2022-07-22 18:01:50,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994721702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:50,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:50,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:01:50,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102264431] [2022-07-22 18:01:50,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:01:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:01:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:50,037 INFO L87 Difference]: Start difference. First operand 74 states and 103 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:50,085 INFO L93 Difference]: Finished difference Result 164 states and 243 transitions. [2022-07-22 18:01:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:01:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-22 18:01:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:50,089 INFO L225 Difference]: With dead ends: 164 [2022-07-22 18:01:50,090 INFO L226 Difference]: Without dead ends: 113 [2022-07-22 18:01:50,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:50,092 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:50,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-22 18:01:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-07-22 18:01:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4636363636363636) internal successors, (161), 110 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2022-07-22 18:01:50,122 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 41 [2022-07-22 18:01:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:50,124 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2022-07-22 18:01:50,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2022-07-22 18:01:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 18:01:50,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:50,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:50,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 18:01:50,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2033327635, now seen corresponding path program 1 times [2022-07-22 18:01:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:50,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047703205] [2022-07-22 18:01:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047703205] [2022-07-22 18:01:50,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047703205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:50,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:50,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:01:50,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719421452] [2022-07-22 18:01:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:01:50,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:01:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:50,273 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:50,320 INFO L93 Difference]: Finished difference Result 263 states and 397 transitions. [2022-07-22 18:01:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:01:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-22 18:01:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:50,322 INFO L225 Difference]: With dead ends: 263 [2022-07-22 18:01:50,322 INFO L226 Difference]: Without dead ends: 175 [2022-07-22 18:01:50,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:50,324 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 59 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:50,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 204 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-07-22 18:01:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-07-22 18:01:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4883720930232558) internal successors, (256), 172 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 256 transitions. [2022-07-22 18:01:50,356 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 256 transitions. Word has length 42 [2022-07-22 18:01:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:50,356 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 256 transitions. [2022-07-22 18:01:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 256 transitions. [2022-07-22 18:01:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 18:01:50,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:50,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:50,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 18:01:50,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:50,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1819327886, now seen corresponding path program 1 times [2022-07-22 18:01:50,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:50,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636967196] [2022-07-22 18:01:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:50,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:50,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:50,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636967196] [2022-07-22 18:01:50,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636967196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:50,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:50,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:01:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957398990] [2022-07-22 18:01:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:50,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:01:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:01:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:01:50,484 INFO L87 Difference]: Start difference. First operand 173 states and 256 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:50,642 INFO L93 Difference]: Finished difference Result 773 states and 1188 transitions. [2022-07-22 18:01:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:01:50,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-22 18:01:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:50,648 INFO L225 Difference]: With dead ends: 773 [2022-07-22 18:01:50,663 INFO L226 Difference]: Without dead ends: 623 [2022-07-22 18:01:50,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:01:50,675 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 403 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:50,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 532 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:01:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-22 18:01:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 321. [2022-07-22 18:01:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.5) internal successors, (480), 320 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 480 transitions. [2022-07-22 18:01:50,734 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 480 transitions. Word has length 43 [2022-07-22 18:01:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:50,736 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 480 transitions. [2022-07-22 18:01:50,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 480 transitions. [2022-07-22 18:01:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 18:01:50,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:50,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:50,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 18:01:50,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -947913043, now seen corresponding path program 1 times [2022-07-22 18:01:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352729994] [2022-07-22 18:01:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:50,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352729994] [2022-07-22 18:01:50,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352729994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:50,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:50,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:01:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855921255] [2022-07-22 18:01:50,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:50,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:01:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:01:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:01:50,910 INFO L87 Difference]: Start difference. First operand 321 states and 480 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:51,062 INFO L93 Difference]: Finished difference Result 1143 states and 1727 transitions. [2022-07-22 18:01:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:01:51,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 18:01:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:51,067 INFO L225 Difference]: With dead ends: 1143 [2022-07-22 18:01:51,067 INFO L226 Difference]: Without dead ends: 845 [2022-07-22 18:01:51,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:01:51,071 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 239 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:51,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 346 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:01:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-07-22 18:01:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 841. [2022-07-22 18:01:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5) internal successors, (1260), 840 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1260 transitions. [2022-07-22 18:01:51,202 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1260 transitions. Word has length 44 [2022-07-22 18:01:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:51,204 INFO L495 AbstractCegarLoop]: Abstraction has 841 states and 1260 transitions. [2022-07-22 18:01:51,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1260 transitions. [2022-07-22 18:01:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 18:01:51,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:51,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:51,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 18:01:51,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1382364025, now seen corresponding path program 1 times [2022-07-22 18:01:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:51,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260705094] [2022-07-22 18:01:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:51,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:51,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:51,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260705094] [2022-07-22 18:01:51,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260705094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:51,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:51,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 18:01:51,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718688439] [2022-07-22 18:01:51,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:51,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 18:01:51,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 18:01:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 18:01:51,391 INFO L87 Difference]: Start difference. First operand 841 states and 1260 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:51,736 INFO L93 Difference]: Finished difference Result 1755 states and 2593 transitions. [2022-07-22 18:01:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 18:01:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 18:01:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:51,742 INFO L225 Difference]: With dead ends: 1755 [2022-07-22 18:01:51,742 INFO L226 Difference]: Without dead ends: 1753 [2022-07-22 18:01:51,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-22 18:01:51,744 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 540 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:51,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 501 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-07-22 18:01:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 913. [2022-07-22 18:01:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.4605263157894737) internal successors, (1332), 912 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1332 transitions. [2022-07-22 18:01:51,877 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1332 transitions. Word has length 45 [2022-07-22 18:01:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:51,878 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1332 transitions. [2022-07-22 18:01:51,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1332 transitions. [2022-07-22 18:01:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 18:01:51,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:51,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 18:01:51,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 148966672, now seen corresponding path program 1 times [2022-07-22 18:01:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806860543] [2022-07-22 18:01:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806860543] [2022-07-22 18:01:51,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806860543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:51,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:51,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:01:51,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744176677] [2022-07-22 18:01:51,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:51,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:01:51,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:51,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:01:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:51,968 INFO L87 Difference]: Start difference. First operand 913 states and 1332 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:52,188 INFO L93 Difference]: Finished difference Result 2393 states and 3478 transitions. [2022-07-22 18:01:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:01:52,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-22 18:01:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:52,194 INFO L225 Difference]: With dead ends: 2393 [2022-07-22 18:01:52,207 INFO L226 Difference]: Without dead ends: 1503 [2022-07-22 18:01:52,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:52,210 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 49 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:52,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 178 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-07-22 18:01:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1481. [2022-07-22 18:01:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.4243243243243244) internal successors, (2108), 1480 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2108 transitions. [2022-07-22 18:01:52,394 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2108 transitions. Word has length 46 [2022-07-22 18:01:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:52,395 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 2108 transitions. [2022-07-22 18:01:52,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2108 transitions. [2022-07-22 18:01:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 18:01:52,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:52,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 18:01:52,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1623386325, now seen corresponding path program 1 times [2022-07-22 18:01:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155263894] [2022-07-22 18:01:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:52,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:52,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155263894] [2022-07-22 18:01:52,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155263894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:52,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:52,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:01:52,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472154402] [2022-07-22 18:01:52,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:52,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:01:52,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:52,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:01:52,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:52,448 INFO L87 Difference]: Start difference. First operand 1481 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:52,748 INFO L93 Difference]: Finished difference Result 3000 states and 4298 transitions. [2022-07-22 18:01:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:01:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-22 18:01:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:52,756 INFO L225 Difference]: With dead ends: 3000 [2022-07-22 18:01:52,771 INFO L226 Difference]: Without dead ends: 2109 [2022-07-22 18:01:52,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:52,774 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 65 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:52,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2022-07-22 18:01:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2107. [2022-07-22 18:01:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 1.4064577397910731) internal successors, (2962), 2106 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2962 transitions. [2022-07-22 18:01:53,085 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2962 transitions. Word has length 47 [2022-07-22 18:01:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:53,086 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2962 transitions. [2022-07-22 18:01:53,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2962 transitions. [2022-07-22 18:01:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:01:53,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:53,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 18:01:53,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 876819086, now seen corresponding path program 1 times [2022-07-22 18:01:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:53,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163136728] [2022-07-22 18:01:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 18:01:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163136728] [2022-07-22 18:01:53,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163136728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:53,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:53,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:01:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792086841] [2022-07-22 18:01:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:01:53,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:01:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:01:53,210 INFO L87 Difference]: Start difference. First operand 2107 states and 2962 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:53,581 INFO L93 Difference]: Finished difference Result 3749 states and 5326 transitions. [2022-07-22 18:01:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:01:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-22 18:01:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:53,608 INFO L225 Difference]: With dead ends: 3749 [2022-07-22 18:01:53,608 INFO L226 Difference]: Without dead ends: 2991 [2022-07-22 18:01:53,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:01:53,615 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 279 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:53,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 462 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:01:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2022-07-22 18:01:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2721. [2022-07-22 18:01:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 1.4073529411764707) internal successors, (3828), 2720 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3828 transitions. [2022-07-22 18:01:53,963 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3828 transitions. Word has length 66 [2022-07-22 18:01:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:53,964 INFO L495 AbstractCegarLoop]: Abstraction has 2721 states and 3828 transitions. [2022-07-22 18:01:53,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3828 transitions. [2022-07-22 18:01:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:01:53,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:53,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:53,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 18:01:53,967 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1304165150, now seen corresponding path program 1 times [2022-07-22 18:01:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600862017] [2022-07-22 18:01:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600862017] [2022-07-22 18:01:54,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600862017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:54,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:54,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:01:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971778192] [2022-07-22 18:01:54,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:54,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:01:54,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:01:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:54,053 INFO L87 Difference]: Start difference. First operand 2721 states and 3828 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:54,410 INFO L93 Difference]: Finished difference Result 4469 states and 6263 transitions. [2022-07-22 18:01:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:01:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-22 18:01:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:54,433 INFO L225 Difference]: With dead ends: 4469 [2022-07-22 18:01:54,434 INFO L226 Difference]: Without dead ends: 2909 [2022-07-22 18:01:54,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:01:54,437 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:54,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 219 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:01:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2022-07-22 18:01:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2772. [2022-07-22 18:01:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2771 states have (on average 1.3789245759653554) internal successors, (3821), 2771 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3821 transitions. [2022-07-22 18:01:54,751 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3821 transitions. Word has length 66 [2022-07-22 18:01:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:54,752 INFO L495 AbstractCegarLoop]: Abstraction has 2772 states and 3821 transitions. [2022-07-22 18:01:54,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3821 transitions. [2022-07-22 18:01:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:01:54,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:54,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 18:01:54,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1558535868, now seen corresponding path program 1 times [2022-07-22 18:01:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:54,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821314814] [2022-07-22 18:01:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:54,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 18:01:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:54,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821314814] [2022-07-22 18:01:54,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821314814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:01:54,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:01:54,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:01:54,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877727738] [2022-07-22 18:01:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:01:54,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:01:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:01:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:01:54,855 INFO L87 Difference]: Start difference. First operand 2772 states and 3821 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:01:55,201 INFO L93 Difference]: Finished difference Result 3833 states and 5332 transitions. [2022-07-22 18:01:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:01:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-22 18:01:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:01:55,231 INFO L225 Difference]: With dead ends: 3833 [2022-07-22 18:01:55,231 INFO L226 Difference]: Without dead ends: 3441 [2022-07-22 18:01:55,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:01:55,234 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 285 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:01:55,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 439 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:01:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2022-07-22 18:01:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3150. [2022-07-22 18:01:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 1.3817084788821847) internal successors, (4351), 3149 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4351 transitions. [2022-07-22 18:01:55,579 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4351 transitions. Word has length 66 [2022-07-22 18:01:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:01:55,580 INFO L495 AbstractCegarLoop]: Abstraction has 3150 states and 4351 transitions. [2022-07-22 18:01:55,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:01:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4351 transitions. [2022-07-22 18:01:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 18:01:55,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:01:55,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:01:55,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 18:01:55,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:01:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:01:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -333777212, now seen corresponding path program 1 times [2022-07-22 18:01:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:01:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381126683] [2022-07-22 18:01:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:01:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:01:55,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:01:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381126683] [2022-07-22 18:01:55,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381126683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 18:01:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696547917] [2022-07-22 18:01:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:01:55,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 18:01:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:01:55,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 18:01:55,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 18:01:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:01:55,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 18:01:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 18:01:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:01:56,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 18:01:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:01:56,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696547917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 18:01:56,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 18:01:56,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2022-07-22 18:01:56,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951083406] [2022-07-22 18:01:56,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 18:01:56,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 18:01:56,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:01:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 18:01:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-22 18:01:56,654 INFO L87 Difference]: Start difference. First operand 3150 states and 4351 transitions. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:02,512 INFO L93 Difference]: Finished difference Result 31671 states and 43517 transitions. [2022-07-22 18:02:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 18:02:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 18:02:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:02,597 INFO L225 Difference]: With dead ends: 31671 [2022-07-22 18:02:02,598 INFO L226 Difference]: Without dead ends: 28554 [2022-07-22 18:02:02,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1251, Invalid=5069, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 18:02:02,613 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 2704 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:02,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 1837 Invalid, 1696 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [130 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 18:02:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28554 states. [2022-07-22 18:02:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28554 to 16941. [2022-07-22 18:02:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16941 states, 16940 states have (on average 1.3589728453364818) internal successors, (23021), 16940 states have internal predecessors, (23021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16941 states to 16941 states and 23021 transitions. [2022-07-22 18:02:04,420 INFO L78 Accepts]: Start accepts. Automaton has 16941 states and 23021 transitions. Word has length 67 [2022-07-22 18:02:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:02:04,421 INFO L495 AbstractCegarLoop]: Abstraction has 16941 states and 23021 transitions. [2022-07-22 18:02:04,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 16941 states and 23021 transitions. [2022-07-22 18:02:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 18:02:04,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:02:04,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:02:04,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 18:02:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 18:02:04,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:02:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:02:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1942679399, now seen corresponding path program 1 times [2022-07-22 18:02:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:02:04,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036662833] [2022-07-22 18:02:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:04,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:02:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:02:04,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:02:04,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036662833] [2022-07-22 18:02:04,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036662833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:02:04,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:02:04,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:02:04,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823562671] [2022-07-22 18:02:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:02:04,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:02:04,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:02:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:02:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:02:04,692 INFO L87 Difference]: Start difference. First operand 16941 states and 23021 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:06,569 INFO L93 Difference]: Finished difference Result 43849 states and 59351 transitions. [2022-07-22 18:02:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:02:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-22 18:02:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:06,662 INFO L225 Difference]: With dead ends: 43849 [2022-07-22 18:02:06,663 INFO L226 Difference]: Without dead ends: 29850 [2022-07-22 18:02:06,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:02:06,684 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:06,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 203 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:02:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29850 states. [2022-07-22 18:02:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29850 to 29810. [2022-07-22 18:02:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29810 states, 29809 states have (on average 1.3364084672414371) internal successors, (39837), 29809 states have internal predecessors, (39837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29810 states to 29810 states and 39837 transitions. [2022-07-22 18:02:08,517 INFO L78 Accepts]: Start accepts. Automaton has 29810 states and 39837 transitions. Word has length 68 [2022-07-22 18:02:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:02:08,517 INFO L495 AbstractCegarLoop]: Abstraction has 29810 states and 39837 transitions. [2022-07-22 18:02:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29810 states and 39837 transitions. [2022-07-22 18:02:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 18:02:08,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:02:08,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:02:08,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 18:02:08,522 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:02:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:02:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash 13414152, now seen corresponding path program 1 times [2022-07-22 18:02:08,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:02:08,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631653072] [2022-07-22 18:02:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:02:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:02:08,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:02:08,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631653072] [2022-07-22 18:02:08,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631653072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:02:08,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:02:08,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:02:08,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047890317] [2022-07-22 18:02:08,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:02:08,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:02:08,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:02:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:02:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:02:08,577 INFO L87 Difference]: Start difference. First operand 29810 states and 39837 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:10,618 INFO L93 Difference]: Finished difference Result 46563 states and 62680 transitions. [2022-07-22 18:02:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:02:10,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 18:02:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:10,774 INFO L225 Difference]: With dead ends: 46563 [2022-07-22 18:02:10,785 INFO L226 Difference]: Without dead ends: 39211 [2022-07-22 18:02:10,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:02:10,816 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 271 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:10,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 489 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:02:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39211 states. [2022-07-22 18:02:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39211 to 35828. [2022-07-22 18:02:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35828 states, 35827 states have (on average 1.3327378792530773) internal successors, (47748), 35827 states have internal predecessors, (47748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35828 states to 35828 states and 47748 transitions. [2022-07-22 18:02:13,371 INFO L78 Accepts]: Start accepts. Automaton has 35828 states and 47748 transitions. Word has length 69 [2022-07-22 18:02:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:02:13,371 INFO L495 AbstractCegarLoop]: Abstraction has 35828 states and 47748 transitions. [2022-07-22 18:02:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 35828 states and 47748 transitions. [2022-07-22 18:02:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 18:02:13,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:02:13,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:02:13,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 18:02:13,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:02:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:02:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1336169493, now seen corresponding path program 1 times [2022-07-22 18:02:13,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:02:13,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299627930] [2022-07-22 18:02:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:13,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:02:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:02:13,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:02:13,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299627930] [2022-07-22 18:02:13,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299627930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:02:13,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:02:13,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:02:13,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97682144] [2022-07-22 18:02:13,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:02:13,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:02:13,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:02:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:02:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:02:13,403 INFO L87 Difference]: Start difference. First operand 35828 states and 47748 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:16,545 INFO L93 Difference]: Finished difference Result 84541 states and 112161 transitions. [2022-07-22 18:02:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:02:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 18:02:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:16,650 INFO L225 Difference]: With dead ends: 84541 [2022-07-22 18:02:16,650 INFO L226 Difference]: Without dead ends: 50714 [2022-07-22 18:02:16,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:02:16,692 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:16,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 238 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:02:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50714 states. [2022-07-22 18:02:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50714 to 41050. [2022-07-22 18:02:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41050 states, 41049 states have (on average 1.3163779872834904) internal successors, (54036), 41049 states have internal predecessors, (54036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41050 states to 41050 states and 54036 transitions. [2022-07-22 18:02:19,796 INFO L78 Accepts]: Start accepts. Automaton has 41050 states and 54036 transitions. Word has length 69 [2022-07-22 18:02:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:02:19,796 INFO L495 AbstractCegarLoop]: Abstraction has 41050 states and 54036 transitions. [2022-07-22 18:02:19,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 41050 states and 54036 transitions. [2022-07-22 18:02:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 18:02:19,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:02:19,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:02:19,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 18:02:19,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:02:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:02:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 896200571, now seen corresponding path program 1 times [2022-07-22 18:02:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:02:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331711828] [2022-07-22 18:02:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:19,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:02:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:02:19,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:02:19,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331711828] [2022-07-22 18:02:19,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331711828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 18:02:19,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946694777] [2022-07-22 18:02:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:19,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 18:02:19,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:02:19,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 18:02:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 18:02:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 18:02:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 18:02:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:02:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 18:02:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:02:20,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946694777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 18:02:20,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 18:02:20,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-22 18:02:20,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008282680] [2022-07-22 18:02:20,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 18:02:20,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 18:02:20,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:02:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 18:02:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-22 18:02:20,387 INFO L87 Difference]: Start difference. First operand 41050 states and 54036 transitions. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:25,808 INFO L93 Difference]: Finished difference Result 95842 states and 126171 transitions. [2022-07-22 18:02:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 18:02:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-22 18:02:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:26,022 INFO L225 Difference]: With dead ends: 95842 [2022-07-22 18:02:26,023 INFO L226 Difference]: Without dead ends: 70591 [2022-07-22 18:02:26,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-22 18:02:26,078 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 1552 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:26,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 427 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 18:02:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70591 states. [2022-07-22 18:02:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70591 to 41740. [2022-07-22 18:02:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41740 states, 41739 states have (on average 1.3282781092024245) internal successors, (55441), 41739 states have internal predecessors, (55441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41740 states to 41740 states and 55441 transitions. [2022-07-22 18:02:29,748 INFO L78 Accepts]: Start accepts. Automaton has 41740 states and 55441 transitions. Word has length 70 [2022-07-22 18:02:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:02:29,749 INFO L495 AbstractCegarLoop]: Abstraction has 41740 states and 55441 transitions. [2022-07-22 18:02:29,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41740 states and 55441 transitions. [2022-07-22 18:02:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 18:02:29,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:02:29,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:02:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 18:02:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 18:02:30,083 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:02:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:02:30,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1077094294, now seen corresponding path program 1 times [2022-07-22 18:02:30,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:02:30,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435664342] [2022-07-22 18:02:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:02:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:02:30,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:02:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435664342] [2022-07-22 18:02:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435664342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:02:30,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:02:30,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:02:30,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806502884] [2022-07-22 18:02:30,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:02:30,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:02:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:02:30,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:02:30,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:02:30,137 INFO L87 Difference]: Start difference. First operand 41740 states and 55441 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:32,251 INFO L93 Difference]: Finished difference Result 46531 states and 61426 transitions. [2022-07-22 18:02:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:02:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-22 18:02:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:32,293 INFO L225 Difference]: With dead ends: 46531 [2022-07-22 18:02:32,293 INFO L226 Difference]: Without dead ends: 28649 [2022-07-22 18:02:32,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:02:32,338 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 53 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:32,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 252 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:02:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28649 states. [2022-07-22 18:02:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28649 to 28631. [2022-07-22 18:02:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28631 states, 28630 states have (on average 1.3024799161718477) internal successors, (37290), 28630 states have internal predecessors, (37290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28631 states to 28631 states and 37290 transitions. [2022-07-22 18:02:34,568 INFO L78 Accepts]: Start accepts. Automaton has 28631 states and 37290 transitions. Word has length 72 [2022-07-22 18:02:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:02:34,568 INFO L495 AbstractCegarLoop]: Abstraction has 28631 states and 37290 transitions. [2022-07-22 18:02:34,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 28631 states and 37290 transitions. [2022-07-22 18:02:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 18:02:34,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:02:34,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:02:34,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 18:02:34,600 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:02:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:02:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 133357367, now seen corresponding path program 1 times [2022-07-22 18:02:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:02:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975942537] [2022-07-22 18:02:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:02:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:02:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:02:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 18:02:34,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:02:34,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975942537] [2022-07-22 18:02:34,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975942537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:02:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:02:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:02:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321086346] [2022-07-22 18:02:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:02:34,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 18:02:34,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:02:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 18:02:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 18:02:34,677 INFO L87 Difference]: Start difference. First operand 28631 states and 37290 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:02:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:02:37,749 INFO L93 Difference]: Finished difference Result 61516 states and 79862 transitions. [2022-07-22 18:02:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 18:02:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-22 18:02:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:02:37,799 INFO L225 Difference]: With dead ends: 61516 [2022-07-22 18:02:37,799 INFO L226 Difference]: Without dead ends: 32935 [2022-07-22 18:02:37,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 18:02:37,816 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 440 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:02:37,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 205 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:02:37,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32935 states.